package leetcode;

public class TreeNode {
 int val;
 TreeNode left;
 TreeNode right;

 TreeNode() {
 }

 TreeNode(int val) {
  this.val = val;
 }

 TreeNode(int val, TreeNode left, TreeNode right) {
  this.val = val;
  this.left = left;
  this.right = right;
 }
}